algebra
posted by deedee
how do you subtract 7.9 from 21

Ms. Sue
Line up the decimal points. Add a 0 to 21.
21.0  7.9 = ?
Respond to this Question
Similar Questions

Algebra / Scientific Notation
if you have 19.2 x 10 ^ 20 over 4.8 x 10 ^ 9 Would you first subtract 4.8 from 19.2 then subtract 10 ^ 9 from 10 ^20 Leaving an answer of 14.4 x 10^11? 
Math
if I was doing algebra and it was 3/5a  (4)=5 would I first subtract 4 from each side since when you subtract a negative you actually add it? 
math
Match the equation with the step needed to solve it. 1. 2m  1 = 3m subtract m 2. 2m = 1 + m subtract 2 3. m  1 = 2 subtract 1 4. 2 + m = 3 subtract 2m 5. 2 + m = 1 add 2 6. 3 = 1 + m add 1 
math
Match the equation with the step needed to solve it. 1. 2m  1 = 3m subtract m 2. 2m = 1 + m subtract 2 3. m  1 = 2 subtract 1 4. 2 + m = 3 subtract 2m 5. 2 + m = 1 add 2 6. 3 = 1 + m add 1 
ALGEBRA
Subtract 7.1  (8.3)= 1.2 ? multiply (7.6)(1)(6)=7.6 ? 
algebra equation solving
(y+2 ) (y)  subtract  (y^249) (y^26y+7) The directions are subtract and simplify.... 
algebra equation solving
((y+2)/(y^249))subtract ((y)/(y^2+6y7)) subtract and simplify ,,,,,i know i need to find LCD which is y+7,and multiply both sides to get it that way i think answer is 6y2/y+7....is this right? 
Math 8R  Help!!!!!!!!!!!!!!!!!!!
14. Subtract 5 from 14 14  (5) 16. Subtract 6 from 18 18  (6) 18. From 14 subtract 2 22. Subtract 17 from 8 I already know how to solve this just have trouble formatting it. How do I do it for number 18 and 22? 
Math, Please Help!
Ned divided a given number by 3 and then added 2. If he should have multiplied the number by 3 and then subtracted 2, which of the following two steps can he do next to get the correct answer? 
algebra
Write the expression for each of the following: a]add 9 to y b]subtract p from 15 b]divide m by 3 d]multiply 4 by g e]subtract 12 from 8a f]find the sum of 5 and 9 2